Researchers at Universal Display, developed an OLED device with plasmonic decay rate enhancement that dramatically increase device stability. By including a nanoparticle-based out-coupling scheme to extract energy from the plasmon mode, the researchers managed to maintain the device efficiency.
The device used an archetypal phosphorescent emitter to achieve a two-fold increase in functional stability at the same brightness as a reference conventional OLED device and extracted 16% of the energy from the plasmon mode as light.
The researchers out-coupled the light by randomly arranging silver nanocube on the silver cathode (separated by a dielectric layer). This design is called a plasmon nanopatch antenna (NPA). The plasmon NPA developed in this research (which differs from previously developed NPA designs) here achieved a nearly three-fold stability increase compared to a reference OLED device.